What component is designed to create less flash gas to increase refrigeration efficiency and performance?
A. The condenser
B. The evaporator
C. The thermostatic expansion valve
D. The subcooler
Answer: D
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Answer the following statement(s) true (T) or false (F)
1. With variable torque loads, the torque varies as the square of the speed. 2. The electronic shear pin reacts to the amount—and rate —of current increase to the motor. 3. The half-wave rectifier circuit requires two diodes and the use of a center-tapped secondary AC transformer. 4. In a three-phase rectifier system, the DC level remains high and the ripple percentage is very low; therefore, the DC supply needs very little filtering. 5. The armature power is typically controlled by an SCR that is turned on at different points in the waveform to adjust the voltage to the motor armature to control the speed.
An object is weighed four times, and the results, in milligrams, are 234, 236, 233, and 229. The object is then weighed four times on a different scale, and the results, in milligrams, are 236, 225, 245, and 240. The average of all eight measurements will be used to estimate the weight. Someone suggests estimating the uncertainty in this estimate as follows: Compute the standard deviation of all eight measurements. Call this quantity s. The uncertainty is then 
Is this correct? Explain.
What will be an ideal response?
A test bar and indicator can be used to check alignment
Indicate whether the statement is true or false
Large businesses and medium-sized businesses vary from one another in all of the following except:
A) number of interconnections B) type of data equipment and voice equipment C) size of the units used D) none of the above (they are different in all of the above ways)